JPS6476830A - Infrared refractometer - Google Patents
Infrared refractometerInfo
- Publication number
- JPS6476830A JPS6476830A JP63205924A JP20592488A JPS6476830A JP S6476830 A JPS6476830 A JP S6476830A JP 63205924 A JP63205924 A JP 63205924A JP 20592488 A JP20592488 A JP 20592488A JP S6476830 A JPS6476830 A JP S6476830A
- Authority
- JP
- Japan
- Prior art keywords
- image
- refractive power
- target
- eye
- measured value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To perform the monitoring of the state of an eye to be examined during measurement and the checking and confirmation of a measured value of refractive power on the same monitor picture and to easily perform measuring operation, by also using a monitor display part for displaying the image of an anterior part as the display part of the measured value of refractive power and displaying the image of the anterior part and the measured value of refractive power on the same picture. CONSTITUTION:The target image projected on the retina by a projection optical system is correctly formed when an eye 13 to be examined has the refractive power of emmetropia. When the eye 13 to be examined is short sight or long sight, for example, the target image generates a crack. In this case, when a target 7 is moved along a projection optical axis 5 so as to obtain a correct image forming state, the position of the target at that time is displayed in the form of corrected power on a scale 27 and this corrected power is projected on an imaging tube 36 by a scale projected system. In the examination of astigmatism, the target image is observed while an image rotary element 14 is rotated and the angle of an astigmatic axis is detected. The astigmatic axis at this time is displayed by an angle scale.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63205924A JPS6476830A (en) | 1988-08-19 | 1988-08-19 | Infrared refractometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63205924A JPS6476830A (en) | 1988-08-19 | 1988-08-19 | Infrared refractometer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6476830A true JPS6476830A (en) | 1989-03-22 |
JPH027651B2 JPH027651B2 (en) | 1990-02-20 |
Family
ID=16514995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63205924A Granted JPS6476830A (en) | 1988-08-19 | 1988-08-19 | Infrared refractometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6476830A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019216816A (en) * | 2018-06-15 | 2019-12-26 | 株式会社トプコン | Ophthalmologic apparatus |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51330A (en) * | 1974-06-19 | 1976-01-06 | Canon Kk | |
JPS519815A (en) * | 1974-07-16 | 1976-01-26 | Canon Kk | |
US4019813A (en) * | 1976-01-19 | 1977-04-26 | Baylor College Of Medicine | Optical apparatus for obtaining measurements of portions of the eye |
JPS5434592A (en) * | 1977-08-24 | 1979-03-14 | Tokyo Optical | Infrared ray refractometer |
JPS5542624A (en) * | 1978-09-20 | 1980-03-26 | Canon Kk | Automatic eye refraction measuring system |
JPS60148538A (en) * | 1984-01-13 | 1985-08-05 | キヤノン株式会社 | Display selection method of eye refraction force |
-
1988
- 1988-08-19 JP JP63205924A patent/JPS6476830A/en active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51330A (en) * | 1974-06-19 | 1976-01-06 | Canon Kk | |
JPS519815A (en) * | 1974-07-16 | 1976-01-26 | Canon Kk | |
US4019813A (en) * | 1976-01-19 | 1977-04-26 | Baylor College Of Medicine | Optical apparatus for obtaining measurements of portions of the eye |
JPS5434592A (en) * | 1977-08-24 | 1979-03-14 | Tokyo Optical | Infrared ray refractometer |
JPS5542624A (en) * | 1978-09-20 | 1980-03-26 | Canon Kk | Automatic eye refraction measuring system |
JPS60148538A (en) * | 1984-01-13 | 1985-08-05 | キヤノン株式会社 | Display selection method of eye refraction force |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019216816A (en) * | 2018-06-15 | 2019-12-26 | 株式会社トプコン | Ophthalmologic apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH027651B2 (en) | 1990-02-20 |
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